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Creating a reduced-fat chocolate that melts in your mouth

Date:
April 27, 2016
Source:
American Chemical Society
Summary:
Chocolate is divinely delicious, mouthwateringly smooth and unfortunately full of fat. But reducing the fat content of the confection makes it harder and less likely to melt in your mouth. That's why scientists are investigating additives that could reinstate chocolate's delightful properties in these lower-fat treats. Now, researchers report an analysis that sheds light on how adding limonene could improve lower-fat versions' texture and ability to melt.
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Chocolate (stock image). Researchers investigated how adding limonene to cocoa butter could result in better reduced-fat chocolate.
Credit: © picsfive / Fotolia

Chocolate is divinely delicious, mouthwateringly smooth and unfortunately full of fat. But reducing the fat content of the confection makes it harder and less likely to melt in your mouth. That's why scientists are investigating additives that could reinstate chocolate's delightful properties in these lower-fat treats. Now, researchers report in ACS' Journal of Agricultural and Food Chemistry an analysis that sheds light on how adding limonene could improve lower-fat versions' texture and ability to melt.

Flavor and sweetness make strong contributions to the pleasant experience of eating chocolate, but so do look and feel. Reducing the fat in chocolate, however, often ruins its texture and viscosity. Previous research has shown that adding limonene -- a compound found in lemons and oranges -- results in a smoother, softer chocolate that melts more easily than typical reduced-fat chocolates. Annelien Rigolle and colleagues at KU Leuven in Belgium sought to investigate exactly how limonene impacts chocolate production. They focused on one part of this process: the crystallization of one of its main ingredients, cocoa butter, which undergoes several important transformations at different times and temperatures.

The researchers examined crystallization at 63 °F and 68 °F using differential scanning calorimetry and X-ray diffraction to examine cocoa butter profiles when limonene was added. Surprisingly, they found that adding the compound accelerated cocoa butter crystallization at 63 °F, but inhibited cocoa butter crystallization at 68 °F. Varied concentrations of limonene also affected the crystallization steps of the cocoa butter differently, so they could ultimately affect the texture of chocolate. The study suggests that carefully choosing the amount of limonene and the temperature at which chocolate is processed could lead to a smoother, more luxurious reduced-fat chocolate.

The researchers acknowledge funding from the Fund for Scientific Research-Flanders, Belgium (FWO), and KU Leuven University.


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Materials provided by American Chemical Society. Note: Content may be edited for style and length.


Journal Reference:

  1. Annelien Rigolle, Bart Goderis, Koen Van Den Abeele, Imogen Foubert. Isothermal Crystallization Behavior of Cocoa Butter at 17 and 20 °C with and without Limonene. Journal of Agricultural and Food Chemistry, 2016; DOI: 10.1021/acs.jafc.5b05965

Cite This Page:

American Chemical Society. "Creating a reduced-fat chocolate that melts in your mouth." ScienceDaily. ScienceDaily, 27 April 2016. <www.sciencedaily.com/releases/2016/04/160427150507.htm>.
American Chemical Society. (2016, April 27). Creating a reduced-fat chocolate that melts in your mouth. ScienceDaily. Retrieved May 24, 2017 from www.sciencedaily.com/releases/2016/04/160427150507.htm
American Chemical Society. "Creating a reduced-fat chocolate that melts in your mouth." ScienceDaily. www.sciencedaily.com/releases/2016/04/160427150507.htm (accessed May 24, 2017).

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